I think the best is Omron from Japan.
An oxygen generator, as its name implies, is a machine for producing oxygen. Its principle is to use air separation technology. Using the adsorption performance and physical principle of molecular sieve, nitrogen and oxygen in the air are separated by a large displacement oil-free compressor, and finally high concentration oxygen is obtained. This kind of oxygen generator has high oxygen production speed and high oxygen concentration, and is suitable for oxygen therapy and health care of all kinds of people.
Omron was founded in 1933, and its products cover a wide range, reaching hundreds of thousands. Omron's many years of industry experience in the industry makes it a leading sensor and control technology patent.
Omron's new 2L oxygen generator is fashionable and beautifully designed. Intelligent microcomputer flow valve has accurate information and accurate adjustment. LCD display is convenient for middle-aged and elderly people to view and operate. Patented silencing technology reduces the noise to below 45 decibels.
Omron oxygen generator also has atomization function and moderate oxygen production flow. Its products are mainly produced by Shenzhen Xinnuozhi OEM.